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Noble metal-free bifunctional oxygen evolution and oxygen reduction acidic media electro-catalysts [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:
Article numbers 28,367 : digital, PDF file
Additional Creators:
United States. Department of Energy. Office of Basic Energy Sciences, National Science Foundation (U.S.), and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
We report that identification of low cost, highly active, durable completely noble metal-free electro-catalyst for oxygen reduction reaction (ORR) in proton exchange membrane (PEM) fuel cells, oxygen evolution reaction (OER) in PEM based water electrolysis and metal air batteries remains one of the major unfulfilled scientific and technological challenges of PEM based acid mediated electro-catalysts. In contrast, several non-noble metals based electro-catalysts have been identified for alkaline and neutral medium water electrolysis and fuel cells. Furthermore, we report for the very first time, F doped Cu1.5Mn1.5O4, identified by exploiting theoretical first principles calculations for ORR and OER in PEM based systems. The identified novel noble metal-free electro-catalyst showed similar onset potential (1.43 V for OER and 1 V for ORR vs RHE) to that of IrO2 and Pt/C, respectively. The system also displayed excellent electrochemical activity comparable to IrO2 for OER and Pt/C for ORR, respectively, along with remarkable long term stability for 6000 cycles in acidic media validating theory, while also displaying superior methanol tolerance and yielding recommended power densities in full cell configurations.
Report Numbers:
E 1.99:1312963
Subject(s):
Note:
Published through SciTech Connect.
07/06/2016.
"srep28367"
Scientific Reports 6 ISSN 2045-2322 AM
Prasad Prakash Patel; Moni Kanchan Datta; Oleg I. Velikokhatnyi; Ramalinga Kuruba; Krishnan Damodaran; Prashanth Jampani; Bharat Gattu; Pavithra Murugavel Shanthi; Sameer S. Damle; Prashant N. Kumta.
Univ. of Pittsburgh, Pittsburgh, PA (United States)
Funding Information:
SC0001531
0933141
1511390
View MARC record | catkey: 24043955